CN101878010A

CN101878010A - Absorbent article

Info

Publication number: CN101878010A
Application number: CN2008801183765A
Authority: CN
Inventors: 大土井晴子
Original assignee: Daio Paper Corp
Current assignee: Daio Paper Corp
Priority date: 2007-11-30
Filing date: 2008-11-26
Publication date: 2010-11-03
Anticipated expiration: 2028-11-26
Also published as: WO2009069635A1; KR20100108522A; EP2216001A4; JP4522444B2; US8377021B2; CN101878010B; US20100305539A1; EP2216001B1; JP2009131501A; EP2216001A1; KR101527423B1

Abstract

To prevent wrinkles formed in a flap member and relieve unpleasantness and friction upon wearing. A sanitary napkin (1) having an absorbent (4) arranged between a liquid-permeable front face sheet (3) and a liquid-impermeable back face sheet (2) and having a flap member (F) which is free from the absorbent (4) and formed in the periphery, wherein the outer shape of the flap member (F) at least in the front side part and the back side part of the sanitary napkin (1) at least consists of a wavy line (10) comprising a combination of convex curves (11, 13) and a concave curve (12) formed by continuously altering the directions of tangent lines to the outline of the flap member (F), and the width of the absorbent (4) is gradually narrowed in the front side part and the back side part to give a peak line (4a) along which the wavy line (10) as described above is formed.

Description

Absorbent commodity

Technical field

The present invention relates to be used to absorb the absorbent commodity such as sanitary napkin, sanitary pad, incontinence pad of menses, leucorrhea etc., relate to the fold that prevents flap portion in detail and the absorbent commodity that reduces the discomfort when wearing.

Background technology

All the time, as sanitary napkin, the sanitary pad, the leucorrhea liner, the absorbent commodity N of incontinence pad etc., for example shown in Figure 8, known following absorbent commodity: the opaque liquid the inside sheet of making by polythene strip or the stacked non-woven fabrics of polyethylene etc. 50, and get involved the absorber of making by cotton official form for filing a lawsuit slurry etc. 52 between the liquid permeability surface patch of making by non-woven fabrics or conductivity of an aperture plastic sheet etc. 51, and, on surperficial both sides, dispose sidepiece non-woven fabrics 53 respectively along its length, form around described absorber 52 that described the inside sheet 50 and surface patch 51 or sidepiece non-woven fabrics 53 engage, the flap portion that does not have absorber 52.

As this absorbent commodity N, because described absorber 52 forms general square shape or Pear-Shaped, so trim line also forms general square shape, ellipse or Pear-Shaped on the whole, it is soft with contacting of skin that its leading section and rearward end make, the therefore general simple circular-arc curve (for example with reference to following patent documentation 1～2) that forms.

When being fixed on above-mentioned absorbent commodity N on the underwear 20, as shown in Figure 9, N is attached to the part with absorbent commodity, to draw out from underwear to side outstanding above-mentioned wing flap W, W, two wing flap W, W are folding along fold line RL, RL, and the crotch part that is involved in underwear also is adhered to crotch's outer surface of underwear 20 simultaneously.

Patent documentation 1: TOHKEMY 2003-275240 communique

Patent documentation 2: TOHKEMY 2004-49696 communique

But among this absorbent commodity N, as shown in figure 10, lower limb is under the situation of the position of LF when for example taking one's seat, and the both sides of the front part of flap portion (among this figure by the part shown in the oblique line) produced fold by the extruding of the inside part of lower limb in the both sides of this flap portion.If further increase extruding force, then the fold that produces in both sides develops into interior side, becomes the fold of the flap portion integral body of front part, the reason of clot.Particularly, as mentioned above, form on the whole among the absorbent commodity N of prior art of general square shape, ellipse or Pear-Shaped, the both sides of the front part of flap portion are easy to be subjected to the extruding force from the inboard leg part, are easy to generate fold on flap portion.

In addition, since when taking one's seat lower limb in the position of LF, so underwear also increases from fold on one's body.Therefore, the fold that requires flap portion and this underwear self to produce is crooked integratedly, or when the fold of underwear is removed not residual fold and flatly restoring along underwear.But, among the absorbent commodity N of prior art, as mentioned above, the leading section of flap portion forms with simple circular-arc curve, therefore interact with extruding force and cause flap portion bending or clot from the inboard leg part, even when the fold of underwear was removed, the bending or the clot of flap portion also still left behind.

The fold that produces in the described flap portion, bending, clot generation and Body contact and become the reason of discomfort or be easy to generate skin and the problems such as friction of fold.

On the other hand, in the flap portion of rear side too, for example when walking etc., as shown in figure 10, the lower limb at rear is in the position of LB, but under this situation, same with the front side flap portion, in the rear side flap portion, also produce fold, bending, clot, become the reason that produces discomfort, friction.

Summary of the invention

Therefore, major subjects of the present invention is, a kind of fold that suppresses to produce in the flap portion is provided and reduces the discomfort when wearing, the absorbent commodity of friction.

In order to solve above-mentioned problem, as the present invention of technical scheme 1, provide a kind of absorbent commodity, between liquid permeability surface patch and opaque liquid the inside sheet, be folded with absorber, and form the flap portion that does not have absorber around, it is characterized in that,

The profile of the front part of described at least absorbent commodity and the described flap portion of rear section forms the convex curve that the direction by the tangent line of the trim line that makes this flap portion changes continuously and the wavy shape line that constitutes of concavity curve, and on described front part and rear section, form the parallax of the mountain shape that the width of described absorber narrows down gradually, and form described wavy shape line along this parallax.

In technique scheme 1 described invention, the profile of the front part at least of absorbent commodity and the flap portion of rear section forms the convex curve that the direction by the tangent line of the trim line that makes this flap portion changes continuously and the wavy shape line that constitutes of concavity curve, therefore, even the both sides of the flap portion of front part or rear section are pushed by the inside part of lower limb, wavy shape line also can play a role so that this extruding force little by little acts on or shifts, thereby can be suppressed at the fold that produces on the two side portions of flap portion and develop into interior side, and for by moving from the flexible power that produces that produces on one's body too because of lower limb at underwear, because the profile of flap portion forms with described wavy shape line, therefore wavy shape line also can play a role so that this extruding force little by little acts on or shifts, and forms bending thereby eliminate on flap portion, the situation of clot.Therefore, the fold of flap portion be can suppress, and discomfort, friction when wearing reduced.

In addition, on the front part and rear section of described absorbent commodity, form the parallax of the mountain shape that the width of described absorber narrows down gradually, and form described wavy shape line along this parallax.Promptly, the absorber that makes the part that contacts with the lower limb root is the shape of incised notch, and make described wavy shape line along above-mentioned shape, therefore extruding force can be reduced in the both sides of the front part of absorbent commodity and rear section, thereby the generation of the fold of flap portion can be reduced from the inside part of lower limb.

As technical scheme 2 described the present invention, provide as technical scheme 1 described absorbent commodity, wherein, on the front part and rear section of described absorbent commodity, described flap portion forms the flap width from the absorber end edge to trim line relatively largely on the central leading section of described absorbent commodity, relative to the flap width of ninor feature one-tenth from the absorber end edge to trim line on the described wavy shape line part that the described parallax along both sides forms.

In technique scheme 2 described inventions, when taking one's seat or during walking etc., on the central leading section of the untouched absorbent commodity of lower limb, make the size of flap portion bigger, can tackle the preceding seepage or the back seepage of body fluid thus, on the other hand, on the part that is formed with the wavy shape line that contacts with the lower limb root, become the size of flap portion, prevent the fold, twisted of flap portion thus than ninor feature.

As technical scheme 3 described the present invention, each described absorbent commodity as

technical scheme

1,2 is provided, wherein, on the front part and rear section of described absorbent commodity, the profile of described flap portion forms the convex curve of relatively large curvature on the central leading section of described absorbent commodity, be the concavity curve of less relatively curvature and the combination of convex curve on the described wavy shape line part that the described parallax along both sides forms.

In technique scheme 3 described inventions, the convex curve that forms on the flap portion and the curvature of concavity curve are changed on each position, can tackle extruding force thus from all directions of the inside part of lower limb, and the fold that can tackle all angles that produce on the underwear.

According to the present invention of above detailed description, because therefore the fold that can suppress to produce on the flap portion can reduce discomfort and friction when wearing.

Description of drawings

Fig. 1 is the part section expanded view of sanitary napkin 1 of the present invention.

Fig. 2 is that the II-II of Fig. 1 is to view.

Fig. 3 is the underwear expanded view of expression lower limb with respect to the position of sanitary napkin 1.

Fig. 4 is the enlarged drawing of front part of the sanitary napkin 1 of Fig. 3.

Fig. 5 is the underwear expanded view that the direction of the fold that underwear moves is followed in explanation.

Fig. 6 is the enlarged drawing of front part of the sanitary napkin 1 of Fig. 5.

Fig. 7 is the expanded view of the sanitary napkin 1 of other embodiment of expression.

Fig. 8 is the part section expanded view of the absorbent commodity N of expression prior art.

Fig. 9 is the axonometric chart of the state of wearing of expression absorbent commodity N.

Figure 10 is the underwear expanded view of expression lower limb with respect to the position of absorbent commodity N.

Label declaration

1 ... sanitary napkin, 2 ... opaque liquid the inside sheet, 3 ... liquid permeability surface patch, 4 ... absorber, 5 ... crimped paper, 7 ... sidepiece non-woven fabrics, F ... flap portion, W ... the wing flap

The specific embodiment

Below, with reference to accompanying drawing embodiments of the present invention are elaborated.Fig. 1 is the part section expanded view of sanitary napkin 1 of the present invention, and Fig. 2 is that the II-II of Fig. 1 is to view.

The opaque liquid the inside sheet 2 that above-mentioned sanitary napkin 1 is made by polythene strip, polypropylene foil etc., make liquid permeability surface patch 3 that menses or leucorrhea etc. see through rapidly, the absorber of making by cotton official form for filing a lawsuit slurry or synthetic paper-pulp etc. 4 between these two

sheets

2,3, for the shape that keeps this absorber 4 and improve that diffusibility centers on the crimped paper 5 of above-mentioned absorber 4 and the sidepiece non-woven

fabrics

7,7 that forms along its length respectively in surperficial both sides constitutes.Around above-mentioned absorber 4, thereon in the lower edge portion, engage the peripheral portion of above-mentioned opaque liquid the inside sheet 2 and liquid permeability surface patch 3 by adhesion means such as bonding agent such as hot melt agent or heat-sealings, in addition, in its both sides of the edge portion, engage by adhesion means such as bonding agent such as hot melt agent or heat-sealings comparing above-mentioned opaque liquid the inside sheet 2 that absorber 4 extends to the side and above-mentioned sidepiece non-woven fabrics 7, form the flap portion F that does not have absorber 4 in periphery.

Below, further describe the structure of above-mentioned sanitary napkin 1.

Though above-mentioned opaque liquid the inside sheet 2 has adopted alkenes resin sheets such as polyethylene, polypropylene etc. to have the sheet material of water-resisting property at least, but, in addition, the stacked non-woven fabrics that also can adopt stacked non-woven fabrics on polythene strip etc. and form, or further set up defences moisture film and guarantee to use on the basis of opaque liquid non-woven fabric plate (in this case, constituting opaque liquid the inside sheet) etc. in fact by waterproof membrane and non-woven fabrics at folder.In recent years, consider that from preventing vexed wet viewpoint tendency adopts the material with poisture-penetrability.This water proof/poisture-penetrability sheet material is a melting mixing inorganic filler and after forming thin slice in alkenes resins such as polyethylene, polypropylene, thereby extends the little porous sheet that obtains along single shaft or biaxially oriented.Particularly in the present invention, in order to realize the integraty of following flap portion F that describes in detail and underwear S, preferably adopt the high material of flexibilities such as thin film as the inside sheet 2.

Then, the preferred non-woven fabrics that adopts porose or atresia of above-mentioned liquid permeability surface patch 3, porous plastic sheet etc.As the material fiber that constitutes non-woven fabrics, except alkenes such as polyethylene or polypropylene, polyesters, synthetic fibers such as polyamide-based, can adopt natural fibers such as regenerated fibers such as artificial silk or ammonia copper wire, cotton, also can adopt the non-woven fabrics that obtains by suitable processing method such as water acupuncture manipulation, spun-bond process, heat viscosity method, meltblown, needle point method.In these processing methods, the advantage of water acupuncture manipulation is to be imbued with flexibility and drapability, and the advantage of heat viscosity method is fluffy and soft.

Absorber 4 between above-mentioned opaque liquid the inside sheet 2 and liquid permeability surface patch 3 for example is made of fine hair official form for filing a lawsuit slurry and water absorbent polymer.Above-mentioned water absorbent polymer is for example sneaked into as nodular powder in the paper pulp that constitutes absorber.As above-mentioned paper pulp, can exemplify out the material that constitutes by cellulose fibre such as the chemical pulp that obtains from timber, dissolving pulp or man-made cellulose fibers such as artificial silk, acetate fiber, reach in price in function, compare, preferably adopt the long coniferous tree paper pulp of fiber with broad leaf tree paper pulp.As this example, be provided with under the situation of the crimped paper 5 of absorber 4, the result makes crimped paper 5 between liquid permeability surface patch 3 and absorber 4, and the above-mentioned crimped paper 5 good by absorbability spreads body fluid rapidly, and prevents the refluence of these menses etc.Particularly in the present invention, as detailed in the following, discomfort when wearing in order to reduce sanitary towel is as one of purpose, and preferably in the scope of about 0.5～2mm, the manufacture method of absorber 4 is preferably formed fibre pulp, dust-free paper absorber to be imbued with flexibility to the thickness of absorber 4.In addition, though not shown, absorber 4 also can be high structure in the bulging of row's blood mouth correspondence portion.

On the other hand, both sides in the face side of this sanitary napkin 1, respectively along its length and sidepiece non-woven

fabrics

7,7 is set on the roughly total length of sanitary towel 1, the part of the opaque liquid the inside sheet 2 that extends by the part of this sidepiece non-woven

fabrics

7,7 that extends to the side with to identical side forms wing flap W, W.

As above-mentioned sidepiece non-woven fabrics 7, consider from the function aspects of paying attention to, can use water-proofing treatment non-woven fabrics or hydrophilic treated non-woven fabrics.For example, if pay attention to preventing infiltration such as menses, leucorrhea or improve function such as skin sense of touch, the then preferred water-proofing treatment non-woven fabrics that has applied silicon class, wax class, alkyl Chlorizate chromium class waterproofing agent etc. that adopts.In addition, if pay attention to above-mentioned wing flap W, W absorbability to menses etc., then preferably use following hydrophilic treated non-woven fabrics: coexistences such as oxidation product by in the manufacture process of synthetic fibers, making chemical compound with hydrophilic group, for example Polyethylene Glycol and polymeric method or handle the method etc. of the precipitation of hydroxide that surface portion is dissolved have porous and make metal by the slaine of stannic chloride and so on, make the synthetic fibers swelling or have porous, use capillarity and give hydrophilic.

Among the present invention, especially, make the profile of the flap portion F of the front part at least of sanitary napkin 1 and rear section form wavy shape line 10, it is by the direction continually varying

convex curve

11,13 of the tangent line of the trim line that makes this flap portion F and constituting of concavity curve 12, on the front part and rear section of sanitary towel 1, form the parallax 4a of the mountain shape that the width of absorber 4 narrows down gradually, and form described wavy shape line 10 along this parallax 4a.

In more detail, as shown in Figure 4, on the front part and rear section of described sanitary napkin 1, the profile of described flap portion F is: go up at the width central part (central leading section) of sanitary towel 1 and form the relatively large convex curve 11 of curvature, the described wavy shape line 10 that forms along the described parallax 4a of both sides is the wavy curve of convex curve 13 and concavity curve 12 alternate configurations, so that the direction of the tangent line of the trim line of flap portion F changes continuously with respect to the positive negative ground of the straight line parallel with the parallax 4a of absorber 4.Under this situation, the convex curve that preferably disposes on central leading section 11 is for having the relatively large curve of curvature of radius 20～30mm, and is the less relatively concavity curve 12 of the curvature of radius 10～15mm and the combination of convex curve 13 along described wavy shape line 10 parts that the described parallax 4a of both sides forms.

As shown in Figure 3, when for example taking one's seat, with respect to the position of underwear S two lower limbs at LF, LF.Under this situation, on the both sides of the front part of flap portion F, apply extruding force from the inside part of this lower limb.But, in this sanitary napkin 1, owing on front part and two side portions, form described wavy shape line 10, therefore, act on the extruding force of the flap portion trim line of two side portions, concavity curve 12 by wavy shape line and convex

curve

11,13 become little by little and act on (site of action of power is interrupted), by the curve transfer of exerting all one's strength, make thus and do not produce fold on the flap portion F.In addition,, also can on the convex curve part, restrain, not propagate into inside part, therefore can prevent that fold from developing into the interior side of flap portion even hypothesis has produced fold.

In addition, when taking one's seat, because lower limb is in the position of LF, LF, therefore stretch around underwear S self the upper edge lower limb, because this underwear S's is flexible, also acts on compressive or tensile force in the sanitary towel 1, but above-mentioned power is little by little acted on by the concavity curve 12 and the convex

curve

11,13 of wavy shape line owing to rubbing, and, on flap portion F, be difficult to produce fold thus by the curve transfer of exerting all one's strength.

And, as shown in Figure 4, in this sanitary napkin 1, on front part and rear section, flap portion F forms the flap width D 1 from absorber 4 end edge to trim line relatively largely on the central leading section of sanitary napkin 1, and relative to the flap width D 2 of ninor feature one-tenth from absorber 4 end edge to trim line on the formation part of the wavy shape line 10 that the described parallax 4a along both sides forms.This structure when taking one's seat or during walking etc. lower limb also be difficult on the central leading section of the sanitary napkin 1 that touches, can tackle the preceding seepage of body fluid, and on the part that is formed with wavy shape line 10 that contacts with the lower limb root, on flap portion F, be difficult to produce fold, twisted.

On the other hand, under the situation that lower limb moves forward and backward when walking etc., along with the mobile underwear S of lower limb also stretches, this moment underwear S go up with the orthogonal direction of the moving direction of lower limb on fold increase.Particularly, can be clear and definite according to inventor's observed result, as Fig. 5, shown in Figure 6, the moving of the lower limb during along with walking, the flexible direction of underwear S be with respect to about 19 °～40 ° of the length centrage of sanitary towel 1, average about 36 ° angle.At this moment, along with the direction of the moving orthogonal of underwear S on be easy to generate fold, but in this sanitary napkin 1, owing on front part and rear section, be formed with described wavy shape line 10, therefore make the power of the fold of the moving direction that produces this underwear S little by little act on or shift, thereby can prevent the generation of fold.In addition, convex curve 11, convex curve 13 and concavity curve 12 change the direction corresponding to the tangent line of trim line continuously, therefore can tackle the power of the various angles that act in size to a certain degree.

In addition, described wavy shape line 10 must play a role so that produce the power of fold and little by little act on or shift, and therefore is not included among the present invention corresponding to the discontinuous jagged curve of the tangent line of trim line.

[other embodiment]

(1) pattern of above-mentioned wavy shape line 10 change that can suit.That is, the convex

curve

11,13 of the wavy shape line 10 of formation and the curvature of concavity curve 12 are changed arbitrarily.For example on the front part of flap portion F, can make the curvature of convex curve 13 that the ratio of curvature of the convex curve 11 that forms in the front side of sanitary napkin 1 forms along parallax 4a, concavity curve 12 little, also can change the curvature of convex curve and concavity curve at front side and rear side.

(2) in the above-described embodiments, describe, but be suitable for too for the sanitary napkin that shown in Fig. 7 (A), does not have wing flap W, W as the sanitary napkin 1 that is formed with wing flap W, W in the side.And, also can be shown in and omit that to make the profile of the flap portion F of side behind wing flap W, the W be wavy shape line 10 as this figure (B).Thus, also can similarly tackle for the fold that produces at lower crotch with the foregoing description.

Claims

1. an absorbent commodity is folded with absorber, and forms the flap portion that does not have absorber around between liquid permeability surface patch and opaque liquid the inside sheet, it is characterized in that,

2. absorbent commodity as claimed in claim 1, wherein, on the front part and rear section of described absorbent commodity, described flap portion forms the flap width from the absorber end edge to trim line relatively largely on the central leading section of described absorbent commodity, relative to the flap width of ninor feature one-tenth from the absorber end edge to trim line on the described wavy shape line part that the described parallax along both sides forms.

3. as claim 1, each described absorbent commodity of 2, wherein, on the front part and rear section of described absorbent commodity, the profile of described flap portion forms the convex curve of relatively large curvature on the central leading section of described absorbent commodity, be the concavity curve of less relatively curvature and the combination of convex curve on the described wavy shape line part that the described parallax along both sides forms.